Geode, thin section micrograph
Geode in thin section
Concentric banding in agate
Quartz nodule, polarised light micrograph
Amethyst geode
Agate geode
Round agate geode
Amethyst filled geode
Rhyolitic geode
Geode interior section
Geode interior
Blue lace agate
Iron oxide precipitation in agate
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Egyptian jasper stone
Botswana agate stones
Round agate thunderegg
Two agate thundereggs
Agate slice
Botswana agate stone
Dyed agate slice
Moss Agate stone
Amethyst stone
Banded Amethyst stone
Amethyst
Beryl stone
Chalcopyrite
Chiastolite stone
Garnet gemstone
Jasper polished stone
Cut and polished agate
Amethyst and chalcedony
Slice of agate
Amethyst geode interior
Turritella agate
Fuchsite mineral stone
Aragonite crystals
Garnet crystal and rock
Brecciated Jasper stone
Yellow Jasper
Kyanite crystal
Labradorite rock crystals
Fire agate
Opalised fossil
Trachyte. polarised light micrograph
Elbaite on albite and quartz
Schorl and quartz crystals in groundmass
Cut agates
Quartz filled geode
Mica schist folds, polarised light LM
Basaltic dyke rock
Granite, polarised light micrograph
Aplite, polarised light micrograph
Agate. polarised light micrograph
Agate with round centre
Amethyst geodes
Calcite crystal
Calcite
Carnelian gemstone
Leopardskin jasper stone
Agate lava geode
Cordierite, polarised light micrograph
Dolerite rock crystals, polarised LM
Rhyolite, light micrograph
Quartz crystals
Orange crystal
Smoky quartz crystals
Rose quartz mineral, artwork
Prismatic amethyst crystal
Opal
Jasper, polarised light micrograph
Quartz vein in granite
Cross-section slice of Brazilian agate
Carnelian pebble
Brecciated agate
Unakite mineral stone
Zeolite crystal
Hope Chrysoberyl gemstone
Crystalline limestone rock
Brecciated agate rock
Agate stone with round whorls
Agate silica crystals in stone
Cross section of agate stone
Agate stone patterns
Lace agate stone
Agate cross section
Jasp agate cabuchon
Moss agate marble pattern
Cross section of hollow agate
Cross section of jasp agate
Cross section of agate
Agate polished cross section
Agate cabuchon stone
Triangular agate stone
Agate polished stone pattern
Hollow agate with crystal
Agate stone with white layers
Agate stone with layers of colour
Fire or MexicAgate
Mocha agate with veined pattern
Agate thunderegg
Brecciated Agate stone
Agate cross section and layers
Agate stone cross section
Agate stone cross section and patterns
Flame agate stone pattern
Dolomite mineral
Fluorite crystal specimen
Gypsum stone
Haematite mineral rock
Onyx
Mounted India dendritic agate
Dendritic crystals in chalcedony
Agate Bridge at Petrified Forest, Arizona
Spotted Jasper stone
Polished Esterel rhyolite agate
Orthogneiss, light micrograph
Heat-treated amethyst
Amethyst crystals
Childrenite crystal in quartz
Sweetwater agates
Mica in quartz, light micrograph
Blue geode
Agate surface
Desert rose mineral clusters
Native gold
Quartz filled concretion